TAS5719: Asking for the TAS5719 digital and analog groun layout

SHH

Part Number: TAS5719

Hi Team,

My customer would like to evaluate TAS5719. For the DVD and PVDD, cusotmer would like to know the analog and digital power/ ground separation inside of chipset.
Could you provide your comment for this gnd layout?

Thanks,
SHH

over 7 years ago

0 Alex Bhandari-Young over 7 years ago

TI__Mastermind 25845 points

Hi SHH,

To confirm, this is a question about the internal layout of the TAS5719 and not PCB layout? I will need to check with design about this, if you can provide some more details this would be very helpful to minimize back and forth. You mentioned power and ground. Which nodes exactly would you like me to ask about? (e.g. DVDD,DVSS,AVDD, etc.)

Regards,

Alex

0 SHH over 7 years ago in reply to Alex Bhandari-Young

TI__Mastermind 30646 points

Hi Alex,

. Why C15,C15,C18 connect to PGND not AVSS? If it can connect all GND together, do customer still need to separate 2 power rail AVDD, DVDD?

So customer woul like to knnow the AVSS and PGND inside chip.

What is the recommendation for the GND connection? tie together?

Thanks,

SHH

0 Alex Bhandari-Young over 7 years ago in reply to SHH

TI__Mastermind 25845 points

Hi SHH,

PGND is used for all grounds on the EVM so it looks like it is okay to short them together. However, I would like to double check with design about this.

Regards,

Alex

0 Alex Bhandari-Young over 7 years ago in reply to Alex Bhandari-Young

TI__Mastermind 25845 points

Hi SHH,

Following up, the grounds are separate on the chip. However, they should be shorted together on the PCB as shown in the EVM. The one exception is AVSS, which is used for the PLL circuitry. This can be routed separately. You can also see that this is done on the EVM.

Best,

Alex

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TAS5719: Asking for the TAS5719 digital and analog groun layout